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Flashcards based language learning app
Yokatta© is an open-source flashcards based language learning app using spaced repetition.
The algorithm is heavily influenced by SuperMemo's SM-2 and follows best practices using
Android Architecture Components provided by Google.

App features:

* selectable themes

* randomize order of flashcard during review

* review animation for visual feedback

* "sligtly-off" toast when answer submitted is not quiet correct

* haptic feedback when submitting an empty answer

* recording pronunciation

* double press "back-button" to exit review

* auto focus input field

* display diagrams to show how many review items have been taken

* swipe gesture to delete/modify existing flashcards

* swipe gestures to easily delete/modify existing flashcards

* search a specific flashcard

* export flashcards to JSON

Open source repository:


Although APK downloads are available below to give you the choice, you should be aware that by installing that way you will not receive update notifications and it's a less secure way to download. We recommend that you install the F-Droid client and use that.

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  • Version v0.3.4 (4) suggested Added on 2021-12-16

    This version requires Android 10 or newer.

    It is built and signed by F-Droid, and guaranteed to correspond to this source tarball.

    • modify or delete the contents of your shared storage
      Allows the app to write the contents of your shared storage.
    • run at startup
      Allows the app to have itself started as soon as the system has finished booting. This can make it take longer to start the phone and allow the app to slow down the overall phone by always running.
    • control vibration
      Allows the app to control the vibrator.
    • record audio
      This app can record audio using the microphone while the app is in use.
    • read the contents of your shared storage
      Allows the app to read the contents of your shared storage.

    Download APK 7.2 MiB PGP Signature | Build Log